seitz



(N5 Model.) 3 sheets-sheet 1.

Y E. SEITZ 8v R. P. PARK.

` GENTRIFUGAL PUMP.

No. 531,652. Patented .15.11. 1, 1895.

D; Nm.

r E H A i W11 i l. :I sq

\\\ I Lib-I 'Il .v

. l E* B 2 i: my b g I i a -hE wa f (No Mdel.) 3 sheets-sheen 2.

E. SEITZ E R. P. PARK.

CBNTRIPUGAL PUMP.

' No. 531,652. Patented Jani 1,1895.l

(No Model.) 3 sumssheet 3.

` E. SEITZ 8v R. P. PARK.

GBNTRIPUGAL PUMP No. 531,652.l Patented Jan. 1, 1895.

rre STATES uric.

CENTRIFUGAL Pun/Hf.-

sPEcIFioATIoN forming part of Letters Patent No. e1,e52, dated January1, 189e.

y' Application filed January 3118'94. Serial No. 498,599. flic model.)

To all whom t may concern:

Be it known that we, EDWARD SEITZ and RICHARD PICKUP PARK, subjects ofthe Queen of Great Britain, and residents of Blackburn, in the Colony ofVictoria, Australia, have invented certain new andus'eful Improvementsin Centrifugal Pumps, of which the following is a specicaton.

This invention has been devised for -the purpose of overcoming certainobjectionable features in connection with centrifugal pumps at presentin common use, and at the same time to supply additional facilities forthe more efiicientworking of this class of pumps than has hitherto beenachieved.

In the past it has been found that when working ordinary centrifugalpumps in connection with Water or uids containing impurities, suchassand, grit, sludge, &c., such impurities find their Way to, orcirculate from y the body of the pump toward and into the bearings,bearing surfaces, or glands, and cause,by the consequent friction, suchparts to wear away abnormally; also that the fluid iinds its way fromthe body of the pump back again tothe intake end of the runner. It hasalso been found desirable to provide some means to efficiently preventany communication or circulation between the body of the pump and thebearings towardthe inlet, or suction end of the pump, in order toobviate the ingress of any air or other iiuid which might find its waythrough the worn surfaces of such bearings into the pump and thusinterfere with the vacuum'in said pump. It has also been found desirablethat some efficient mechanism should be provided for bal-y ancing oradjusting the thrust pressure usually trending in centrifugal pumpstoward the `suction end of the runner. A

Now our invention fulfills these functions by the medium of simple,efficient and easily adjustable mechanisms, and in order that ourinvention may be more easily understood, reference may be made to theaccompanying drawings, in which Figurelillustrates a semi-sectionalelevation of a single action centrifugal pump iitted with ourimprovements; Fig. 2, a semi-sec- 5o tional elevation of a double'actioncentrifugal Y pump similarly fitted; Fig. 3, an end view of Fig. 2; Fig.4, a plan view, partly in section,

of mechanical details shown in elevation at one end of Fig. l and atboth ends of Fig. 2, Fig. 5 illustrates a sectional view of analternative mechanism for operating certain portions of ourimprovements,'hereinafter to .be described, while Fig. 6 illustrates asectional elevation of certain`of our improvements as applied to a pumpdifferent in pattern to that shown on the other figures.

' In the figures A represents the runner of'a centrifugal pump which,for the purposes of illustration, we have shown constructed on theAhollow pipe shaft principle, but, so far as the' invention isconcerned, this runner may be ofany design usually employed in centrif#ugal pumps.

B is the pulley by which motion is transmitted to the pump and which (asshown in Fig. l) is placed upon the small solid shaft C and in Fig. 2upon the hollow pipe shaft D, which latter constitutes part of the pumpand is de facto a continuation of the tubular runner A. f

E represents the casing and frame-Work of the pump.

F is an annular faced plate or rin'gof metal conveniently arrangedanywhere along the outer area or diameter of the runner A, butpreferably in the position shown on Figs. 1, 2 and 5 of the drawings. Inlieu of this `face plate or annular ring F, a face may be turned uponthe metal of A, but we prefer such ring or plate to be distinct from therunner A, so that it may be unscrewed and replaced if it becomes undulyworn.

G (see Figs. 1, 2 and 5) is au annular plate or ring of' metal,preferably, but not arbitrarily, constructed'of an L shaped section asshown, and its face is neatly turned to agree with the face on theannular plate F, so that the face of F may revolve against the face of G-With as little friction but as close proximityl as'possible. Theannular plate or ring G is kept in position by reason of the pressure ofthe rubber rings, or their equivalents Gf, which in their turn areadjusted in position by the screw H pressing upon the ring G2, which isannular, the Whole being so arranged that a gentle, but sufficient,pressure or contact is maintained by theplate G against the IOO plate Fduring the revolution of the latter to prevent sludge or gritty matterfrom finding its way from the body of the pump at A' into the chambersI, or as shown in Fig. G to pre-` vent the fluid passing from themain'fliamber of the pump into the entrance of the runner.

The chamber (I) hereinbefore referred to (see Figs. l, 2, and 5) isprovided at its bottom with lead away canals or ducts I', whichterminate in one or more escape cocks, and so arranged that, should anyfine sludge or grit pass between the faces of the plates F and G intothe chamber I, it may pass away, through the cock, to any convenientplace, a slot above such canal or duct being cut away in the annularplate G. The canal or duct is made sufficiently wide to allow of analtered position of the slot in the annular plate, cousequent on itsmovement forward through wear of the faces of G and F.

)Ve would here have it understood that the annular plate G may be keptforward in its position by any approved mechanism made either elastic,or adjustable, or both; that is to say, either by bolts as I-I, shown onFigs. l and 2, or by an annular pressure water liquid, pneumatic ergaseous chamber as M (Fig. 5), in which latter ease the pressure eitherof water, liquid, air, or gas in the said chamber M automatically keepsforward the ring G2, and exerts a sufficient pressure through the mediumG', upon the faced ring G.

If it be found desirable, the cock or cocks at the bottom of the duct orducts I', may be closed, and water or other lubricant supplied to thechamber I, the said cocks being also closed when it is desired to primethe pump when starting work and in which case the annular sleeve U isscrewed forward, so -as to squeeze up the rubber U and prevent anyprimage water from escaping.

The faced ring G performs a double function-first, for the purpose, asaforesaid, of preventing any gritty or frictional matter from findingits way out to the bearing surfaces or glands; secondly, for preventingcirculation from the main chamber of the pump to the suction or inletpipe, and vice versa.

IVe would now call attention to the mechanism illustrated at the suctionend of Fig. 1, both ends of Fig. 2, and also in views 3 and 4:. In thiscase an L shaped annular faced plate N is arranged to butt against theend of the pump runner shaft D, and is kept in position by the ring Oand packing O. The ring 0 is adjusted in its forward movement by twopusher rods P, P, the adjustment action of these latter being set by aplate P (see Figs. 3 and 4), which said plate is kept in position on therodsPby shoulders and screw nuts P2, while a bolt and nut P3 is arrangedas shown to adjust the forward pressure by both of the said rods P tothe ring O. The annular plate N also fulfills a triple function; that isto say-first,to make a tight joint with the end of the runner A, toprevent the entrance of air from the bearing Q to the vacuum or fiow offluid inside the runner A; second, to prevent any grit vor frietionalmatter from finding its way from the intueijpr of runner A or suctionpipe S into the bearings Q, and, third, to receive and adjust thethrust, caused by the working of the pump, in manner somewhat similar tothe annular plate G, hereinbefore described.

R are lubrication cups for supplying the wearing surfaces with anysuitable lubricant, but in practice the t'rictional surfaces at the endsof plates N and G may be found not to require any additional lubricantother than the water or fluid passing through the pump. v

The modus operandi of our invention is as follows:-Presume that thesingle pump in Fig. l is to be Worked. Rotary motion is imparted to thepulley B from any convenient power. The solid shaft C revolves, carryingwith it the runner A. A vacuumis produced in A, which causes the Huid(required to be pumped), to enter at the suction pipe S and proceedthrough the runner in the direction shown by the small arrows. The fluidthen finds its way into the casing F. and escapes at the outlet E (Fig.3). This working of the pump will cause a thrust to be exerted by therunner A in a direction opposite to that shown by the arrows, and theoperator will, at his discretion, adjust the position of the ring N (bythe medium of the mechanism P, P', P2, and P3, Fig. 4), so as toexertjust sufficient intimacy between the said plateNand the end ef therunner pipe shaft D to prevent any circulation to or ingress from thebearing Q. In like manner the operatorwill adjustthe annular plates G,so as to fulfill the required functions hereinbefere referred to. Shouldthe operator find that any sludge or undesirable matter is lindin g itsway through the annular plates G and F, he will be enabled to judge thenecessary adjusting pressure required to be exerted by the screw boltsI-I, or their equivalent. If it be found that no sludge or gritty matteror fiuid passes from the main chamber E, into the small chamber I hemay, if he desires, close the cocks at I', and allow a supply of water,oil or other lubricant to fill the chamber I, and surround portions of Gand F.

With regard to the annular chamber M, Fig. 5, water or air underpressure may be arranged to fill such said chamber M and act as analternative to the screws I-I, on Figs. l and 2, in keeping the ring G2forward in its position.

Il'aving new particularly described and ascertained the nature of oursaid invention and in what manner the same is to be performed, wedeclare that what We claim isl. In a centrifugal pump, the combinationwith the pump frame and the runner, of bearings near both ends of therunners, face plates batting against such bearings and pusher rods P P,plate P kept in position on said rods by screw nuts P2, and bolt and nutP2 for adjusting the forward pressure by said rods P IOC upon suchbearings and face plates, substana cock trap or shutter for dischargingliquid tially as set forth. from the reception chamber, substantially as2. In'a centrifugal pump, the combination set forth.I

with the runner and lche chambered pari: of Signed this 28th day ofNovember, 1893. Y, 5 the pump casing containing the discharge out-EDWARD SEITZ.

let, of an adjustable annular plate as G inter- RICHARD PICKUP PARK.

posed between the interior of such ehambered Witnesses:

part and the bearing surfaces of the runner, A. O. SACHSE,

the frame and the runner arranged to pro- O'. E., Melbourne. ro Vide areception chamber for liquid in the A. FICK,

rear of ring G, and lead away duets as I and Clerk for A. O. Sachse.

